v1.5.1 — Internationalisation & Period History

What's new

Internationalisation

• 6 languages: Finnish, English, French, German, Spanish, Mandarin (Simplified)
• 412 localised strings across all screens
• Device-locale detection with localStorage override and 'en' fallback

Period / Jakso model

• New school_year column — free-text with autocomplete (e.g. "2025-2026")
• Period field renamed to "jakso" in Finnish, "period" in other locales
• Covers Finnish 5-jakso system, semesters, quarters universally

Period History view

• Accessible from Settings / Archive section
• Grouped by school year -> period -> courses with GPA per group
• Read-only; empty-period re-onboarding prompt when no courses exist

Other

• Updated app icons
• Fastlane metadata added (6 locales: en-US, fi-FI, fr-FR, de-DE, es-ES, zh-CN)
• Gradle wrapper SHA (distributionSha256Sum) added — gradle-8.14.3
• MIT LICENSE confirmed in repo root